general improvements

diff --git a/t/t4041-diff-submodule-option.sh b/t/t4041-diff-submodule-option.sh
index 4e3499ef84c1bc3bb26857d70bf7f5ba78d5bf9a..619bf970983e481af1537eb539d66bdd6b12971f 100755 (executable)
--- a/t/t4041-diff-submodule-option.sh
+++ b/t/t4041-diff-submodule-option.sh
@@ -257,9 +257,7 @@ test_expect_success 'typechanged submodule(blob->submodule)' '
 commit_file sm1 &&
 test_expect_success 'submodule is up to date' '
        git diff-index -p --submodule=log HEAD >actual &&
-       cat >expected <<-EOF &&
-       EOF
-       test_cmp expected actual
+       test_must_be_empty actual
 '
 
 test_expect_success 'submodule contains untracked content' '
@@ -273,17 +271,17 @@ test_expect_success 'submodule contains untracked content' '
 
 test_expect_success 'submodule contains untracked content (untracked ignored)' '
        git diff-index -p --ignore-submodules=untracked --submodule=log HEAD >actual &&
-       ! test -s actual
+       test_must_be_empty actual
 '
 
 test_expect_success 'submodule contains untracked content (dirty ignored)' '
        git diff-index -p --ignore-submodules=dirty --submodule=log HEAD >actual &&
-       ! test -s actual
+       test_must_be_empty actual
 '
 
 test_expect_success 'submodule contains untracked content (all ignored)' '
        git diff-index -p --ignore-submodules=all --submodule=log HEAD >actual &&
-       ! test -s actual
+       test_must_be_empty actual
 '
 
 test_expect_success 'submodule contains untracked and modifed content' '
@@ -308,13 +306,13 @@ test_expect_success 'submodule contains untracked and modifed content (untracked
 test_expect_success 'submodule contains untracked and modifed content (dirty ignored)' '
        echo new > sm1/foo6 &&
        git diff-index -p --ignore-submodules=dirty --submodule=log HEAD >actual &&
-       ! test -s actual
+       test_must_be_empty actual
 '
 
 test_expect_success 'submodule contains untracked and modifed content (all ignored)' '
        echo new > sm1/foo6 &&
        git diff-index -p --ignore-submodules --submodule=log HEAD >actual &&
-       ! test -s actual
+       test_must_be_empty actual
 '
 
 test_expect_success 'submodule contains modifed content' '
@@ -368,7 +366,7 @@ test_expect_success 'modified submodule contains untracked content (dirty ignore
 
 test_expect_success 'modified submodule contains untracked content (all ignored)' '
        git diff-index -p --ignore-submodules=all --submodule=log HEAD >actual &&
-       ! test -s actual
+       test_must_be_empty actual
 '
 
 test_expect_success 'modified submodule contains untracked and modifed content' '
@@ -407,7 +405,7 @@ test_expect_success 'modified submodule contains untracked and modifed content (
 test_expect_success 'modified submodule contains untracked and modifed content (all ignored)' '
        echo modification >> sm1/foo6 &&
        git diff-index -p --ignore-submodules --submodule=log HEAD >actual &&
-       ! test -s actual
+       test_must_be_empty actual
 '
 
 test_expect_success 'modified submodule contains modifed content' '